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tsan: mark shadow for thread stack as "don't need" when thread exits 

llvm-svn: 177288
This commit is contained in:
Dmitry Vyukov 2013-03-18 15:49:07 +00:00
parent 2f69d405cc
commit 2e7f29f042
5 changed files with 13 additions and 21 deletions
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6
compiler-rt/lib/tsan/rtl/tsan_interceptors.cc
View File

@ -619,11 +619,7 @@ TSAN_INTERCEPTOR(void*, mmap64, void *addr, long_t sz, int prot,
TSAN_INTERCEPTOR(int, munmap, void *addr, long_t sz) {
SCOPED_TSAN_INTERCEPTOR(munmap, addr, sz);
// We are about to unmap a chunk of user memory.
// Mark the corresponding shadow memory as not needed.
uptr shadow_beg = MemToShadow((uptr)addr);
uptr shadow_end = MemToShadow((uptr)addr + sz);
FlushUnneededShadowMemory(shadow_beg, shadow_end - shadow_beg);
DontNeedShadowFor((uptr)addr, sz);
int res = REAL(munmap)(addr, sz);
return res;
}

5
compiler-rt/lib/tsan/rtl/tsan_mman.cc
View File

@ -34,10 +34,7 @@ struct MapUnmapCallback {
void OnUnmap(uptr p, uptr size) const {
// We are about to unmap a chunk of user memory.
// Mark the corresponding shadow memory as not needed.
uptr shadow_beg = MemToShadow(p);
uptr shadow_end = MemToShadow(p + size);
CHECK(IsAligned(shadow_end|shadow_beg, GetPageSizeCached()));
FlushUnneededShadowMemory(shadow_beg, shadow_end - shadow_beg);
DontNeedShadowFor(p, size);
}
};

6
compiler-rt/lib/tsan/rtl/tsan_rtl.cc
View File

@ -125,6 +125,12 @@ static void InitializeMemoryProfile() {
internal_start_thread(&MemoryProfileThread, (void*)(uptr)fd);
}
void DontNeedShadowFor(uptr addr, uptr size) {
uptr shadow_beg = MemToShadow(addr);
uptr shadow_end = MemToShadow(addr + size);
FlushUnneededShadowMemory(shadow_beg, shadow_end - shadow_beg);
}
static void MemoryFlushThread(void *arg) {
ScopedInRtl in_rtl;
for (int i = 0; ; i++) {

1
compiler-rt/lib/tsan/rtl/tsan_rtl.h
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@ -527,6 +527,7 @@ void ALWAYS_INLINE INLINE StatSet(ThreadState *thr, StatType typ, u64 n) {
void MapShadow(uptr addr, uptr size);
void MapThreadTrace(uptr addr, uptr size);
void DontNeedShadowFor(uptr addr, uptr size);
void InitializeShadowMemory();
void InitializeInterceptors();
void InitializeDynamicAnnotations();

16
compiler-rt/lib/tsan/rtl/tsan_rtl_thread.cc
View File

@ -200,9 +200,8 @@ void ThreadStart(ThreadState *thr, int tid, uptr os_id) {
GetThreadStackAndTls(tid == 0, &stk_addr, &stk_size, &tls_addr, &tls_size);
if (tid) {
if (stk_addr && stk_size) {
if (stk_addr && stk_size)
MemoryResetRange(thr, /*pc=*/ 1, stk_addr, stk_size);
}
if (tls_addr && tls_size) {
// Check that the thr object is in tls;
@ -225,17 +224,10 @@ void ThreadStart(ThreadState *thr, int tid, uptr os_id) {
void ThreadFinish(ThreadState *thr) {
CHECK_GT(thr->in_rtl, 0);
StatInc(thr, StatThreadFinish);
// FIXME: Treat it as write.
if (thr->stk_addr && thr->stk_size)
MemoryResetRange(thr, /*pc=*/ 3, thr->stk_addr, thr->stk_size);
if (thr->tls_addr && thr->tls_size) {
const uptr thr_beg = (uptr)thr;
const uptr thr_end = (uptr)thr + sizeof(*thr);
// Since the thr object is huge, skip it.
MemoryResetRange(thr, /*pc=*/ 4, thr->tls_addr, thr_beg - thr->tls_addr);
MemoryResetRange(thr, /*pc=*/ 5,
thr_end, thr->tls_addr + thr->tls_size - thr_end);
}
DontNeedShadowFor(thr->stk_addr, thr->stk_size);
if (thr->tls_addr && thr->tls_size)
DontNeedShadowFor(thr->tls_addr, thr->tls_size);
thr->is_alive = false;
Context *ctx = CTX();
ctx->thread_registry->FinishThread(thr->tid);